6749517815 has 4 divisors (see below), whose sum is σ = 8099421384. Its totient is φ = 5399614248.

The previous prime is 6749517799. The next prime is 6749517823. The reversal of 6749517815 is 5187159476.

6749517815 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6749517815 - 2⁴ = 6749517799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674951777 + ... + 674951786.

It is an arithmetic number, because the mean of its divisors is an integer number (2024855346).

Almost surely, 2^6749517815 is an apocalyptic number.

6749517815 is a deficient number, since it is larger than the sum of its proper divisors (1349903569).

6749517815 is a wasteful number, since it uses less digits than its factorization.

6749517815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349903568.

The product of its digits is 2116800, while the sum is 53.

The square root of 6749517815 is about 82155.4490889071. The cubic root of 6749517815 is about 1889.8365726573.

The spelling of 6749517815 in words is "six billion, seven hundred forty-nine million, five hundred seventeen thousand, eight hundred fifteen".